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VN7004AH-E bảng dữ liệu(PDF) 23 Page - STMicroelectronics

tên linh kiện VN7004AH-E
Giải thích chi tiết về linh kiện  High-side driver with CurrentSense analog feedback for automotive applications
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VN7004AH-E
Application information
35
4.3
MCU I/Os protection
If a ground protection network is used and negative transients are present on the VCC line,
the control pins will be pulled negative. ST suggests to insert a resistor (Rprot) in line both to
prevent the microcontroller I/O pins from latch-up and to protect the HSD inputs.
The value of these resistors is a compromise between the leakage current of microcontroller
and the current required by the HSD I/Os (Input levels compatibility) with the latch-up limit of
microcontroller I/Os.
Equation 1
VCCpeak/Ilatchup ≤ Rprot ≤ (VOHμC-VIH-VGND) / IIHmax
Calculation example:
For VCCpeak = -150 V; Ilatchup ≥ 20mA; VOHμC ≥ 4.5V
7.5 k
Ω ≤ Rprot ≤ 140 kΩ.
Recommended values: Rprot =15kΩ
4.4
CS - analog current sense
Diagnostic information on device and load status are provided by an analog output pin (CS)
delivering the following signal:
•
Current monitor: current minitor of channel output current
Table 12. ISO 7637-2 - electrical transient conduction along supply line
Test
Pulse
2011(E)
Test pulse severity
level with Status II
functional performance
status
Minimum
number of
pulses or test
time
Burst cycle / pulse
repetition time
Pulse duration and
pulse generator
internal impedance
Level
US
(1)
1. US is the peak amplitude as defined for each test pulse in ISO 7637-2:2011(E), chapter 5.6.
min
max
1
III
-112V
500 pulses
0,5 s
2ms, 10
Ω
2a
III
+55V
500 pulses
0,2 s
5 s
50
μs, 2
Ω
3a
IV
-220V
1h
90 ms
100 ms
0.1
μs, 50
Ω
3b
IV
+150V
1h
90 ms
100 ms
0.1
μs, 50
Ω
4(2)
2. Test pulse from ISO 7637-2:2004(E).
IV
-7V
1 pulse
100ms, 0.01
Ω
Load dump according to ISO 16750-2:2010
Test B(3)
3.
With 40 V external suppressor referred to ground (-40°C < Tj <150°C).
40V
5 pulse
1 min
400ms, 2
Ω



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